1. The spring migration of 1961 in the Norwegian lemming, Lemmus lemmus L., at Kilpisjärvi, Finnish Lapland;Aho;Annal. Zool. Fenn.,1966
2. Spontane lokomotorische Aktivität;Aschoff;Handb. d. Zoologie Bd.,1962
3. Experimental vole populations in 2 sq.m cages with various initial population density;Bodenheimer;Stud. Biol. Jerusalem,1957
4. Unrewarded exploration and learning of complex mazes by wild and domestic mice;Brant;Nature (Lond),1964
5. Population density and social pathology;Calhoun;Scientific American,1962